Known implementations listed in alphabetical order.
A Packed Bars Observable notebook contains a reusable D3js implementation. An example remix is in the notebook, World Populations 2017. Code is based on the D3js function available on github from Xan Gregg.
An Excel add-in is available on github from Excel guru Jon Peltier and Xan Gregg.
JMP is a commercial desktop statistical visualization package from SAS, Xan Gregg’s employer. JMP 14 includes packed bars as a bar style in the Graph Builder component. All of the charts on this site were produced with JMP. The screenshot below shows a chart under construction with the options visible in the lower left.
An R package, rPackedBar, is available from Adam Spannbauer.